Covid-19 pandemic has influenced the water, sanitation-hygiene security around the world. The current study aims to discover water, sanitation-hygiene (WASH) security of urban slum dwellers during covid-19. Rajshahi City Corporation slums were categorized into inner, middle and outer slum zones to conduct the study. Total of 361 slum household were determined as a sample population at 95% confidence level. A pre-tested semi-structure questionnaire was formulated to conduct household data collection. Data was collected from June–September 2022 and were analysed through SPSS and map was produced by ArcGIS 10.4 software. Study revealed that overall 37.5% respondent used mask to remain safe in pandemic. About 61.5% of the slum dwellers share one tube well and outer slum zone dweller were found higher (79.5%). About 53, 43.3 and 36.7% of outer, middle and inner zone dwellers use common toilet. Major defecation facility of inner slum dwellers was water sealed latrine (47.8%), followed by 24.5 (outer) and 10% (middle). The study also revealed that inner slum zone dwellers were highly (0.74) secured to WASH security and middle and outer zone dwellers were moderately secured. This study reflects that WASH practice needs to be more enhanced in slum communities to combat pandemic situation.